213489078 has 16 divisors (see below), whose sum is σ = 465794496. Its totient is φ = 64693640.

The previous prime is 213489061. The next prime is 213489083. The reversal of 213489078 is 870984312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1617276 + ... + 1617407.

It is an arithmetic number, because the mean of its divisors is an integer number (29112156).

Almost surely, 2^213489078 is an apocalyptic number.

213489078 is an abundant number, since it is smaller than the sum of its proper divisors (252305418).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213489078 is a wasteful number, since it uses less digits than its factorization.

213489078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3234699.

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 213489078 is about 14611.2654482765. The cubic root of 213489078 is about 597.6660047721. Note that the first 3 decimals are identical.

The spelling of 213489078 in words is "two hundred thirteen million, four hundred eighty-nine thousand, seventy-eight".